Finding the Fourth Proportional to 17,911.01, 26,856.86 and 13,740.72

Step by Step Solution

1. Step 1: Write the proportion equation
   17,911.01 : 26,856.86 = 13,740.72 : x
2. Step 2: Convert to fraction form
   17,911.01/26,856.86 = 13,740.72/x
3. Step 3: Cross multiply
   17,911.01x = 26,856.86 × 13,740.72
4. Step 4: Simplify right side
   17,911.01x = 369,032,593.34
5. Step 5: Solve for x
   x = 369,032,593.34/17,911.01
6. Step 6: Final answer
   x = 20,603.67